I suppose you already know this, but just in case, the NEFs shoot best from the bench if you position the forward bag/rest just ahead of or at the hinge spacer which is at the rear of the forend, the idea being to put as little pressure as possible on the barrel stud. Of course there's the "O" ring trick on the stud between barrel and forend. This helps sometimes, but not always. Ice used a rubber grommet on his sportster, said it worked better than the "O" ring. His post is down the page. hth, Tim